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| An Improved Algorithm of Mary SpreadSpectrum Communication |
| ZENG Zhibinga,ZHUANG Yiqia,XIANG Xinb |
| (a.Key Laboratory of Wide BandGap Semiconductor Materials and Devices； b.State Key Lab on ISN, School of Microelectronics, Xidian University, Xi’an 710071, China) |
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Abstract An improved Mary spread spectrum communication algorithm was proposed based on the problem that Mary spread spectrum adopting code phase shift keying (CPSK) needs synchronization information. The scheme is easy to realize because all spread spectrum codes comes from one SS code and its reverse order sequence. The scheme adopts BPSK modulation based on polarity modulation of PN in inphase branch, and CPSK modulation based on phase modulation of PN code in orthogonal branch. The system has the advantages which can achieve carrier synchronization accurately and fleetly, but rather offer additional synchronization resource. The simulation results demonstrate that the algorithm is effective in improving the utilization ratio of system resources.
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Received: 14 August 2009
Published: 28 July 2010
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